Hakari Shirenai Keiko-san

Tamotsu Joukawa, a virgin young man who is currently unemployed, enters a coffee shop to take a break during his job search. There he meets Keiko Yoda, the beautiful, busty shopkeeper who presses him with a proposal to get married to her and work in that coffee shop. Tamotsu, without doing anything, got a job and a wife in one fell swoop; but the numbers-obsessed digital Keiko had a secret! It's a robot girl romantic comedy! (Source: Shonen Gahosha)